ARTD1/PARP1 negatively regulates glycolysis by inhibiting hexokinase 1 independent of NAD+ depletion.
ARTD1/PARP1 negatively regulates glycolysis by inhibiting hexokinase 1 independent of NAD+ depletion.
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DOI:
10.1016/j.celrep.2014.08.036
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发表时间:
2014-09-25
期刊:
影响因子:
8.8
通讯作者:
Sobol RW
中科院分区:
文献类型:
--
作者:
Fouquerel E;Goellner EM;Yu Z;Gagné JP;Barbi de Moura M;Feinstein T;Wheeler D;Redpath P;Li J;Romero G;Migaud M;Van Houten B;Poirier GG;Sobol RW
ARTD1 (PARP1) is a key enzyme involved in DNA repair by synthesizing poly(ADP-ribose) (PAR) in response to strand breaks and plays an important role in cell death following excessive DNA damage. ARTD1-induced cell death is associated with NAD+ depletion and ATP loss, however the molecular mechanism of ARTD1-mediated energy collapse remains elusive. Using real-time metabolic measurements, we directly compared the effects of ARTD1 activation and direct NAD+ depletion. We found that ARTD1-mediated PAR synthesis, but not direct NAD+ depletion, resulted in a block to glycolysis and ATP loss. We then established a proteomics based PAR-interactome after DNA damage and identified hexokinase 1 (HK1) as a PAR binding protein. HK1 activity is suppressed following nuclear ARTD1 activation and binding by PAR. These findings help explain how prolonged activation of ARTD1 triggers energy collapse and cell death, revealing new insight on the importance of nucleus to mitochondria communication via ARTD1 activation.
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14.9
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通讯作者:
Poirier GG
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14.9
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通讯作者:
Poirier, Guy G.
影响因子:
11.2
作者:
Goellner EM;Grimme B;Brown AR;Lin YC;Wang XH;Sugrue KF;Mitchell L;Trivedi RN;Tang JB;Sobol RW
通讯作者:
Sobol RW